sounds like she doesnt need much.
smart toys for that cutie would be what we spent a lot of money on. some of the more ed oriented one were spendy back in the day. cusinair rods were something that we misused quite a bit. they teach number theory. but i chuckle when i see some of the common core math problems illustrated w legos. i have no doubt these laid the ground work for son's amazing math brain.
i am sure the computer games are better than they used to be.

does she play an instrument? maybe something to invest in. or maybe lessons if she is interested, but doesnt.

make art? materials for them both. a box of sketch books for her, as that was all i could manage for years.
(probably the best thing the kids had was a white dog! oh how they decorated that sweet dog.)

i will try to keep this in the back of my mind.